Augsburg Confession - Article 19

Article XIX: Of the Cause of Sin.
Of the Cause of Sin they teach that, although God does create and preserve nature, yet the cause of sin is the will of the wicked, that is, of the devil and ungodlymen; which will, unaided of God, turns itself from God, as Christ says John 8, 44: When he speaketh a lie, he speaketh of his own.